g-osselin



(No Model.) 2 Sheets-Sheet .2.

F. X. G-OSSELIN.

GRATE.

Patented May 7, 1895.

jgs

L Nitin@ 'STATES PATENT irren.

GRA-rs.

SEPECIFICATION forming part of Letters Patent No. 538,829, dated'May *7, 1895.

Y Application fue@ December 21,1894. -serial No. 532,597. on model.)

To all whom, t may concerns Be it known that I, FRANK X. GossnLrN, a citizen of the United States, residing at- West Troy, county of Albany, and State of New York, have invented certainnew and useful Improvements in Grates,of which the following is a specication.

The invention relates to such improvements and consists of the` novel construction and combination of parts hereinafter described and subsequently claimed.

Reference may be had to the accompanying drawings, and theletters of reference marked V thereon, which form a part of this specification.

Similar letters refer to similar partsin the several figures therein.

Figure lof the drawings is a top plan view of my improved grate. Fig. 2 is a side elevation of the same with the bars and supportingframe partly broken away. Fig. 3 is a bottom plan view of same. Fig. 4 isa view in crosssection of a plurality of neighboring bars, taken on the broken line 4 4 in Fig. 2. Fig. 5 is a viewy in side elevation of a portion ofpone n of the bars. Fig.v6 is a vertical section taken on the broken line 6 6in Fig. il.

A is the supporting frame in which four rock-shafts A', A2, A3, and A4 have end bearings. Each rock-shaft is provided with upwardly projecting bar-supports A5 severally` bifurcated and adapted to support one end of algrate bar B. The bar-supports on the rockshaft A support the contiguous ends of the alternate bars. Those on rock-shaft A2 su pp ort the corresponding ends of the other bars, and those on rock-shafts A3 and A4 support in a similar manner the opposite ends of the same bars. The shafts A and A3 which support the opposite ends of the same bars, are connected by a link pivoted at its opposite ends to the respective rock-levers A6 depending from the shafts, and the shafts A2 and A4 are similarly connected by the link A7 pivoted to rocklevers'AB. The cross-bar A9 fixed at its ends upon the side-pieces of the grate-frame, supports about midway of the grate the pivot or fulcrum A10 of the three-arm lever A12, the operating arm A13 being considerably longer than either of the other two. The operating arm extends to the front of the furnace within easy reach of the reman, and is limited in its ivibratory movements by the Vtwo stops A14. The short arms A15 are respectively connected with the links Auand A7 by pins A16 capable of an endwise and sidewise movement in the ;open end slots A17 in the ends of the leverarms.

When the three-armed lever is operated7 an endwise movement is communicated to all the grate-bars, one set of alternate bars being moved in one direction, and theother set of alternate bars being simultaneously moved in the opposite direction.

As a means for connecting the grate-bars `with the bifurcate supports the upper ends of Vthe supports are provided on each bifurcate arm with a half-round offset or pin B and the several bars with a projecting iiangerB2 on each of the opposite sides in the form of an inverted recess having a rounded bottom adapted to receive the half-round pin which its loosely therein, the rounded portion bearingon the rounded bottom of a recess. There kthe upper rounded, and the lower flat, surfaces ofthe pins meet, a comparatively sharp edge is formed on opposite sides of the piuV which engages the side-walls of the bar recess When the bifurcate arms areinclined ortipped in shaking the grate, and prevents the pins from slipping out from engagement with the bar-recesses in case a bar should offer unusual resistance when the bifurcate arms are returned to a vertical position. y

The grate-bars are severally provided on their opposite sides with a projecting lug or knuckle B4, the severall knuckles being so arranged relatively to each'other that they will lie in the same straight line extending transversely of the several bars when the bars are in position for use, as shown in Figs. 1 and 3, so that the neighboring knuckles of the bars will engage with each other. I am thus able to prevent the bars from warping or bending laterally under the induence of the furnace heat, thereby maintaining the bars at a uniform distance apart throughout their lengths.

When the bars are moved as previously described, in shaking the grate, the knuckles move with the bars and pass each other. The jar or vibratory movements imparted to the moving bars by the impact of the knuckles one with another, tends to remove the ashes from the uppersnrface of the bars. To Facilitate such removal of the ashes from the bars I make the upper surface of the indi vidual bars slightly rounded in cross-section, or convex, as shown in Fig. 4 at B5. The jar imparted to the bars during their endwise movements causes the ashes to gravitate from the rounded surface and pass down between the bars to the ash-pit or fioor beneath.

My improved grate is especially adapted for burning very tine or pea coal in which practice the mass of ignited coal above the gratebars is kept very thin to permit of the pas- Sage of sufficient air therethrough to maintain the necessary combustion. It is essential therefore that the movement ofthe grate-bars should be only suliicient to separate the ashes from the unburned coal Without breaking up the ignited mass and interfering with its even distribution over the surface of the grate.

By moving the alternate bars simultaneously and in opposite directions, I not only avoid breaking through the ignited mass, but aid the distribution and maintain a uniform thickness above the grate.

By placing the operating supports and connections beneath the grate, space is economized and the mechanism is accessible from the ashpit for repairs.

When desired, the knuckles on the sides ot' the gratefbars may be projected only far enough to engage with their neighboring knuckles when the bars bend laterally, being projected suiciently to engage before the bars bend perceptibl y.

kvWhat I claim as new, and desire to secure by Letters Patent, is

l. In a grate, a series of parallelgrate-bars movable endwise relatively one to another and severally provided on theiropposite sides with knuckles so arranged relatively to each other that the several knuckles normally occupy approximately the same straight line extending transversely of the several bars, with the neighboring knuckles in engagement with each other, and that the alignment and engagement of the knuckles are broken by the end wise movement of the bars, substantially as described.

2. In a grate, the combination with a series of grate-bars movable endwise and severally provided with an inverted recess rounded on the bottom, of a rock-shaft, means for rocking the shaft, bifurcate bar-supports on the shaft, a pair of half-round pins on each barsupport, one on each bifurcate arm projecting inwardly on the same axial line, with the round part normally bearing upon the rounded bottom of a bar-recess, whereby the bars are supported by such pins, and the sharp edges ot' the pins on one side engage the recess-walls when the bifurcate-arms are inclined, substantially' as described.

3. In a grate, the combination with a plurality'of grate bars movable endwise relatively one to another and severally convexed on their upper sides, of knuckles on the relatively movable bars, engagable with one an other and means for moving the bars whereby the knuckles are made to strike one another, substantially as described.

In testimony whereof l have hereunto set my hand this Sth day of December, 189i.

FRANK X. GOSSELIN.

NVitnesses:

GEO. A. Mosman, FRANK C. CURTIS. 

